/*
 * Copyright (c) 2008-2011, Petr Panteleyev
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 *    1. Redistributions of source code must retain the above copyright notice,
 *       this list of conditions and the following disclaimer.
 *    2. Redistributions in binary form must reproduce the above copyright notice,
 *       this list of conditions and the following disclaimer in the documentation
 *       and/or other materials provided with the distribution.
 *    3. The name of the author may not be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package org.panteleyev.blogclient;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.ArrayList;
import java.util.Collections;

import org.panteleyev.blogclient.events.TemplatesChangedEvent;
import org.panteleyev.swing.WindowManager;

/**
 *
 * @author Petr Panteleyev
 */
public class TemplateManager {
    private ArrayList<Template> templates = new ArrayList<>();

    TemplateManager() {
    }

    ArrayList<Template> getTemplates() {
        return this.templates;
    }

    Template getTemplate(String name) {
        for (Template t : templates) {
            if (t.getName().equals(name)) {
                return t;
            }
        }
        return null;
    }

    Template getTemplate(int index) {
        return templates.get(index);
    }

    void deleteTemplate(int index) {
        templates.remove(index);
        save();
        WindowManager.sendApplicationEvent(new TemplatesChangedEvent(this));
    }

    int getTemplateCount() {
        return templates.size();
    }

    void load() {
        templates.clear();

        File file = Options.getTemplatesFile();
        if (!file.exists()) {
            return;
        }

        try (ObjectInputStream in = new ObjectInputStream(new FileInputStream(file))) {
            int count = in.readInt();

            for (int i = 0; i < count; ++i) {
                Object t = (Template)in.readObject();
                if (t != null && t instanceof Template) {
                    templates.add((Template)t);
                }
            }

            Collections.sort(templates);
        } catch (IOException | ClassNotFoundException ex) {
            MainClass.handleException(null, ex);
        }
    }

    void save() {
        try (ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream(Options.getTemplatesFile()))) {
            out.writeInt(templates.size());

            for (Template t : templates) {
                out.writeObject(t);
            }
        } catch (Exception ex) {
            MainClass.handleException(null, ex);
        }
    }

    void update(Template t) {
        if (!templates.contains(t)) {
            templates.add(t);
        }
        Collections.sort(templates);
        save();

        WindowManager.sendApplicationEvent(new TemplatesChangedEvent(this));
    }

    boolean checkName(Template t, String newName) {
        if (newName == null || newName.isEmpty()) {
            return false;
        }

        Template exists = getTemplate(newName);

        if (exists == null) {
            return true;
        } else {
            return exists == t;
        }
    }
}
